Reversible doorcheck



Mar. 3. 1925. I 1,528,096

. B. CAPRA REVERSIBLE DOORCHECK Filed Nov. 19, 192:5

12 I INVENTOR.

34912061015150 d cqora TTORNEY ,acters of reference marked. thereon, form a part of Patented Mar. '3, 1925.

UNITED -sraxr -is PATENT'OFFICE.

nnnnnm'io cAPnA, OLE-SACRAMENTO, camrormm'.

REVERSIBLE DOORCHECK.

Application filed November 19, 1923. Serial No. 675,535.

' T 0 all whom it may concern":

Be it known that I, BENEDETTO GAPRA, a citizen of the. United States, residing at Sacramento, county of Sacramento, State of California, have invented certain new and useful Improvements in Reversible Doorchecks; and I do declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the charwhich this application.

This invention relates to improvements in door-closing and anti-slamming devices, and

particularly to a door-check of the reversible type shown in my Patent No. 1,449,652, dated March 27th, 1923, and over the device shown in which the door-check of the present invention is an improvement.

The principal object of the present invention is to provide a door-check operating on the same principle as that shown in the above mentioned patent, but provided with a simple tioning means for more positively preventing slamming of the door without having to adjust the door .closinq spring, which -quick closing of may be as strong as necessary to insure a point.

As another ob ect of the present invention, I have arranged the necessary valves I reference indicate corresponding parts in the several views:

Fig. 1 is a top plan view of the doorcheck, as installed in connection with a door.

Fig ber, with the cover removed.

Fig. 3 is a fragmentary section on the line 3-3 of Fig. 2.

Referring now more particularly to the adaptedto The relative settings of the casing and and automatically func-.

the door up to a certain v 2 is a top plan view of theoil cham characters "of reference on the drawings,

the numeral 1 denotes a cylindrical casing, closed on the bottom and adapted to be set in a vertical position, and having ears or lugs 2 whereby it may be secured to a door frame 3.

A removable cover a is provided for the casing, in which is journaled, axially of the casing and extending from top to bottom thereof, a shaft 5 having a radial vane 6 fixed thereon and making a close running fit with the bottom and side wall of the casing, and with the inner face of the cover.

On the upper end of the shaft, above the cover, is fixed one end of the usual adjustable toggle-joint mechanism 7, the opposite end of which is pivoted in a bracket 8 be attached to a door 9.

bracket may be reversed if desired, so as to have the casing attached to the door and the bracket to the door frame.

Fixed in the casing is a partition block 10, having an oiltight fit with the bottom and side walls of thecasmg and with the inner face of the cover, and a close running fit with the shaft.

This partition is of sufficient thickness to enable a pair of spaced orifices 11 being drilled down from the upper face thereof, from the lower ends of which orifices horizontal and independent passages 12 lead to the opposite side faces of the partition.

Said orifices are provided a certain'distance from their upper ends with shoulders forming valve scats'as at 13 for a ball 14,

only one seat being used at a time.

A passage 15, formed as a groove cut in the upper face of the partition, provides communication between the orifices 11 above the valve seats.

' The. casing being erably oil, it will filled with a fluid, prefbe noted that the fluid past the ball in one direction only, depending in which of the two seats the ball is mounted.

This provides the reversible feature of my door-check, as in the previous case.

To enable the position of the ball to be changed when necessary, without removing the cover, the latter is orificed above the orifices 11 and removable plugs 16 mounted in the cover-orifices. The passage 15 is sufii f may pass from "one passage 12 to the other ciently smaller than the ball so that the latfer can never pass therethrough, while the ball seats 13 are sufliciently below. the cover so that the ball can rise to the extent necessary to allow unrestricted flow of the oil therepa st. .Additional and smaller passage means 1 v is provided through the partition between the opposite walls thereof, with an adjustable needle valve 18'interposed therein to regulate the size of the passage-opening, this valve being operable from outside the casing.

A by-pass 19 is cut through the shaft to provide communication between the oppo- 7 site sides of the vane, the openings at ,the

' raised off its seat by the pressure of the oil thereunder. Some of the oil passes through the restricted passage 17 and a larger amount is by-passed around the, vane through by pass 19 as'soon as the dooris opened a certain amount. On account of the large area of the combined passages, very little resistance is offered to the opening of the door.

\Vhen the opening pressure is removed.

from the door, it will automatically start to close due to the action of the usual spring 20 arranged in suitable connection with the shaft and casing. The valve 14 now remains seated, since the pressure is coming the other' way.

The only means now allowing the oil to flow from ahead of to behind'the vane are the passage 17 and bypass 19, both of which being of somewhat limited area, slow down and cushion the closing movement of the door, and provide a resistance to the otherwise quick action of the spring.

As'the door approaches its fully closed position however, the by-pass opening on that side of the ,vane adjacent the partition meets and is gradually overlappedby the shaft engaging face of thevane, thus first restricting and then entirely closing the bypass, until finallythe only remaining passage through which the oil may pass is the very restricted passage 17 Since this passage may be closed down by adjustment of the needle valve 18 so as to allow but a very small amount of oil through. and since oil is practically incompressible,

the door may be absolutely prevented from slamming without I any adjustment of the spring 20 being necessary. At the same time, t 1

e reasonably quick closing of the door for oil is desired, some of the oil may be drained out without affecting the ultimate slow closin movement. From the foregoing description it will be readily seen that I have produced sucha device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in de tail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I- clainl as new and useful and desire to secure by Letters Patent is:

1. A door check comprising a cylindrical and enclosed casing, a shaft turnable therein, a radial vane on the shaft, a partition fixed in the casing and extending from one side thereof to the shaft, the partition having spaced orifices extending inwardly from the outer end thereof and leading to the opposite faces of the partition, passage means between the orifices intermediate their ends, an interchangeable check valve member seated in one of said orifices and removable from the outer end thereof, and removable closure means over the outer ends of the orifices, whereby to enable the valve member to be interchanged at will, and without disturbing any other part.

2. .A door check comprising a cylindrical casing closed on one end, a shaft turnable therein, a radial vane on the shaft, a partition fixed in the casing and extending fromone side thereof to the shaft, the partition having spaced orifices leading inwardly from the end thereof at the open end of the casing, and terminating at the oppositeside faces of the partition, passage means be-' tween the orifices adjacent their outer ends,

an interchangeable check valve member seated'in one of the orifices inwardly of the passage means and removable from the outer end of said orifice, a removable cover for the open end of the casing and partition having *orifices registering with the partition orifices, and removable closure means for said cover orifices, whereby to enable the valve member to be interchanged without removing the cover.

In testimony whereof I aflix my signature.

.BENEDETTO OAPRA. 

